528 
ECONOMIC RELATIONS OF OUR BIRDS. 
Tabular Summary of Economic Relations showing the name and number of 
specimens eating animal and vegetable food, and the number of insects, 
spiders, millipedes and snails taken from the stomachs, classified as to Eco~ 
iwmic Relations under the heads Beneficial Detrimental and Unknown 
Relations. 
Number and Name op Speci¬ 
mens Examined. 
Classification 
OF Food. 
Ratios Represented by Lines. 
Of nine Purple Pinches 
examined. 
1 
8 
0) 
a 
‘3 
Animal food..... 
1 
Vegetal food. 
1 
a 
50 
Detrimental.. .. 
Q 
Mm 
Of two Red Crossbills 
examined. 
"s 
Animal food. 
2 
o 
Vegetal food. 
m 
1 
Animal food. 
1 
Of thirty-four Thistle 
Birds examined. 
33 
.2 
Vegetal food. 
a 
-i-i 
1 
o 
o 
20 
Detrimental. 
Of six Lapland Long- 
spurs examined. 
• 
6 
Contain’d 
Animal food. 
Vegetal food. 
ora 
2 
Animal food. 
gg 
Of ten Savanna Spar¬ 
rows examined. 
.2 
Vegetal food .... 
10 
3 
1 
o 
O 
2 
Detrimental. 
0 
25 
34 
AniTYTAl "Pnrjrl 
73 
Of thirty-six Bay¬ 
winged Buntings ex¬ 
amined . 
OJ 
p 
Vegetal food. 
1 
3 
1 
Beneficial. ^ 
11 
-4-i 
!3 
8 
O 
O 
12 
Detrimental . 
22 
69 
. W»Wi 1IIPI li i 1 
unknown. 
-i-niir(iniiiTiiiiiiiiiio»-iiiniiinri« -. i 
Of three Lincoln’s 
Finches examined. . . 
■a 
0 ) 
a 
o 
O 
Animal food. 
Vegetal food 
10 Unknown. 
o 
Of twenty-five Swamp 
Sparrows examined. 
20 
13 
3 
8 
15 
a 
S 
p 
a 
o 
Animal food. 
Vegetal food 
S^^ESBSSS 
3 
18 
67 
Beneficial ... 
Detrimental 
Unknown ... 
BTHHWSS^^SBBSB 
Of fifty-two Song 
Sparrows examined. 
30 
34 
5 
9 
^3 
0) 
a 
3 
a 
o 
o 
j Animal food. 
i Vegetal food 
10 Beneficial ... 
2.2 Detrimental. 
